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Behringer CX2310/CX3400 Power Supply Mod |
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Blaize110 
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Joined: 11 May 2010 Location: Gloucestershire Status: Offline Points: 449 |
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 Posted: 04 January 2012 at 8:48pm |
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Yeah, I guess it probably would... I really don't have too much experience in this area though. Might see if an electronic engineer friend of mine would like a project though :)
EDIT: Though as this circuit is probably not regulated so will drop as the battery flattens, it might be an idea to have a slightly higher voltage, regulated back down to keep it constant. Edited by Blaize110 - 04 January 2012 at 8:59pm |
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Blaize110
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Posted: 07 January 2012 at 12:12pm |
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Just been asking the seller of this:
http://www.ebay.co.uk/itm/Switching-boost-Power-Supply-board-DC12V-DC-32V-180W-ASSEMBLED-AND-TESTED-NEW-/220859401029?pt=UK_MusicalInstr_Amplifiers_RL&hash=item336c3f0345#ht_1645wt_1110
and apparently the input is 9-14V (ideal!) and the voltage is also adjustable on the board. So it looks just the thing :)
Edited by Blaize110 - 07 January 2012 at 12:14pm |
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Blaize110
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Posted: 12 January 2012 at 8:48am |
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Just bought a CX3400 so will take some meter readings and have a fiddle when it arrives :)
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Blaize110
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Posted: 13 February 2012 at 6:17pm |
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CX3400 arrived and just spent a while poking about inside it:
 From what I gather, it is a: - Center tapped transformer giving about +/- 22V AC - Rectified and smoothed to roughly +/- 21V DC - Voltage regulated to +/- 15V DC for use in the crossover. I figure the best place to insert my stepped up dual rail power supply would be on the +/- 21V pads left conveniently there, so that no matter what gets chucked in (within reason), it can sort itself out. My only question would be, will the existing rectifying components affect the dual rail supply in any adverse ways? I can't imagine they would, other than providing some rather larger smoothing caps than would be required... But thought i'd best check. |
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infrasound
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Joined: 13 May 2011 Location: brstl/leics Status: Offline Points: 1244 |
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Posted: 13 February 2012 at 7:01pm |
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Forget their rectification, smoothing caps and regulation.
Buy a fixed buck converter off Farnell http://uk.farnell.com/dc-dc-converters They should offer 2% regulation for ±15v and can operate off pretty much any voltage (Bear in mind supplies can range from 10v-15v worst case). Eff>85%. Input current is often a few mA. Or if you use WEBENCH you can order a simple switcher (buck boost) evaluation board that has >94% eff, but these cost around £50 shipped to the UK. You can otherwise design your own on there, I think around 97% eff is theoretical, if it's constant current and narrow Vin. Not sure what the op-amps use, probably around a few watts max? The power supplies (regulators, im looking at you) seem to use the majority of the power.
Edited by infrasound - 13 February 2012 at 7:03pm |
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JR.junior
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Posted: 13 February 2012 at 7:43pm |
As I said earlier..
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Support the scoop technology, larger mouth plays louder!
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Blaize110
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Posted: 13 February 2012 at 8:18pm |
I did have a look and found that they were relatively expensive once the power started increasing, but I guess I'd need less power if most of it is used in the regulators like you said. I am also quite tempted by these: http://www.ebay.co.uk/itm/220859401029?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_1645wt_1110 Not sure about the quality but for £13 it might be worth a shot. |
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infrasound
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Posted: 13 February 2012 at 8:36pm |
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Measure the current with a multimeter then you'll know for certain.
 What are you tempted to use that power supply for?? I take it you don't mean the crossover.
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Blaize110
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Posted: 13 February 2012 at 8:40pm |
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Yeah, measuring the current is on my todo list.
I have contacted the seller and apparently the power supply will take 9-14V input and the output is adjustable on the board. So it might work. But i'll know what's best once i've had a look at the current.
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audiomik
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Posted: 13 February 2012 at 9:11pm |
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Rory
have PM'd you with an offer of assistance Mik |
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Rule #1: "there are no such things as problems
...........................only solutions we haven't thought of yet" |
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JR.junior wrote: